Is it possible to have a property sensor detect another property?
Is it possible to have a property sensor detect another property?


(I assume you want to compare on property's value with another property's value.)

No, the property sensor evaluates a single property only. 

When you want to evaluate more properties you can use the expression controller:

property_1 &lt; property_2


or the Python controller

import bge 

controller = bge.logic.getCurrentController()
owner = controller.owner
if owner["property_1"] &lt; owner["property_2"]:
    for actuator in controller.actuators:
        controller.activate(actuator)
else:
    for actuator in controller.actuators:
        controller.deactivate(actuator)


I hope this helps